It's the first time Ms Dobrowski has taken her brownies to Agfest but she expects demand to be high.

"We have been absolutely flat out of late, to get ready for Agfest we have been putting in 12- to 14-hour days for the past week to just meet the demand," she said yesterday.

Her brownies supply for Agfest contain more than 260 kilograms of Anvers chocolate and Ms Dobrowski said she lost count how many times she had bought up all of the supplies of Duck River butter from supermarkets.

This is because, since Modo Mio's win at the Sydney Fine Food Awards, business has been booming.

The operation has already grown out of its commercial kitchen in Spreyton and Ms Dobrowski is looking to extend.

"My house was first taken over with brownies and now we have outgrown our commercial kitchen, so I'm in talks with the owner to possibly extend the building."

The East Devonport cook wants to grow the brand even further with the idea she would like to open shops in Melbourne and Sydney.

"At the end of the day it's only a recipe and so it can be made anywhere really.

"The goal for us would be so see stores open in Melbourne and Sydney using all Tasmanian products.